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Oxidative dehydrogenation of ethane to ethene over a superbase supported LiCl system

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Chinese Chemical Letters 2010年第11期21卷 1366-1369页

作者： Yu Bao Zhao Wen Wen Tan hui Li Xiao hui Jia hui lin wan School of Chemistry and Chemical Engineering University of South China Hengyang 421001 China State Key Laboratory for Physical Chemistry of Solid Surfaces Department of Chemistry and Institute of Physical Chemistry Xiamen University Xiamen 361005 China

LiCl-promoted superbase catalysts were found to be stable and highly selective to ethene for oxidative dehydrogenation of ethane,giving 84%ethane conversion and 74%ethene yield at 923 *** indicated that the stronger t... 详细信息

关键词： Oxidative dehydrogenation ODH Ethane Ethene Superbase LiCl

P-modified cobalt oxide: A novel and effective catalyst for oxidative dehydrogenation of propane

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Chinese Chemical Letters 2013年第9期24卷 789-792页

作者： Xiao-Zhang lin Guang-Chao Li Chuan-Jing Huang Wei-Zheng Weng hui-lin wan State Key Laboratory of Physical Chemistry of Solid Surfaces National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University

A series ofnanosized cobalt oxide catalysts modified with phosphorus have been synthesized by the solgel method and investigated in the oxidative dehydrogenation of propane to propene. With the addition of phosphorus, the crystallite size of the catalyst was largely decreased, while the P species in the catalyst were highly dispersed. Compared to pure cobalt oxide, the P-modified samples showed higher propane conversion and enhanced propene selectivity. Over the PCoO catalyst with a P/Co atomic ratio of 0.05, the maximal propene yields of 15.7% with a propane conversion of 28.3% were obtained at 520 ℃.

关键词： Propane Propene Oxidative dehydrogenation Nanosized PCoO catalyst

Density Functional Theory Study on Spin States of LaCoO3 at Room Temperature

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Chinese Journal of Chemical Physics 2014年第3期27卷 274-278页

作者： Xiang-bo Zhang Gang Fu hui-lin wan State Key Laboratory for Physical Chemistry of Solid Surfaces Department of Chemistry College ofChemistry & Chemical Engineering Xiamen University Xiamen 361005 China

The electronic structure of the perovskite LaCoO3 at room temperature structure （293 K） was calculated by using PBE, PBE＋U and HSE. Different spin configurations have been considered. Our calculations showed that the choice of the Hubbard U parameter in DFT＋U and mixing factor α in HSE significantly influenced the band gap as well as relative energies. For the spin exited states, the optimal value for U and α were 3.0 eV and 0.05, respectively. Our calculation also emphasized that when U〉5.0 eV, PBE＋U would lead to unreasonable electronic structure and energy order.

关键词： Perovskite LaCoO3 Density functional theory

XRD & XPS Study on the BaF_2 Promoted Sm_2O_3-LaF_3 Catalysts

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Chinese Chemical Letters 1997年第1期8卷 83-86页

作者： Ji Zhong LUO and hui lin wan(Department of Chemistry & State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen UniversityXiamen 361005) Department of Chemistry State Key Lab. Phys. Chem. Solid S. Xiamen University Xiamen 361005 China

Sm2O3-LaF3 and BaF2 promoted Sm2O3W3 catalysts shown good catalytic performance for the Oxidative Dehydrogenation of Ethane(ODE). XRD and XPS characterizations of the catalysts show the structure defects, which may be produced by the partial exchange of anions and cations,enhance the electron donating ability and increase the surface absorbed oxygen concentration thus should be favorable to improve the catalytic activity. However, the higher concentration of surface adsorbed oxygen is unfavorable for the ethene selectivity.

关键词： Sm La XRD XPS Study on the BaF2 Promoted Sm2O3-LaF3 Catalysts

A New Catalyst for Hydrogen Transfer Hydrogenation of Acetophenone

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Chinese Chemical Letters 1997年第3期8卷 255-258页

作者： Pian Pian XU Rong hui ZHENG Jing Xing GAO Pei Qing HUANG hui lin wan （Department of Chemistry and Stste Key Laboratory of Physical Chemistry of Solid Surface Xiamen University, Xiamen 361005 ） Department of Chemistry State Key Lab. Phys. Chem. Solid S. Xiamen University Xiamen 361005 China

A new C-2-symmetric diamine/diphosphine Ruthenium (II) complex, RuCl2P2N2H4, was used as an excellent catalyst to carry out the catalytic hydrogen transfer reduction of acetophenone. The conversion of acetophenone to 2-phenylethanol was up to 99% under the following reaction conditions: substrate:Ru:(CH3)(2)CHOK = 200:1:12; reaction temperature of 65 degrees C; reaction time of 2 h; normal pressure. A hydride transfer mechanism was also discussed.

关键词： A New Catalyst for Hydrogen Transfer Hydrogenation of Acetophenone Pro Chen wang

METHANE OXIDATIVE COUPlinG OVER METAL OXYFLUORIDE CATALYSTS

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Chinese Chemical Letters 1993年第7期4卷 603-604页

作者： Xiao Ping ZHOU Wei De ZHANG hui lin wan Khi Rui TSAI Department of Chemistry, Xiamen University, Xiamen, 361005

The MOC reaction over ZrO_2/LaF_3, CeO_2/LaF_3 and ThO_2/LaF_3 catalysts indicated that these catalysts had high activity and high C_2 selectivity at low temperature. In the temperature range 480℃ to 650℃. The methane conversion was 24. 4% to 30. 8% and the C_2 selectivity was 40. 0% to 55. 4%. The XRD characterization of the catalysts indicated that O^2. and F exchang happened and LaOF was formed.

关键词： over than METHANE OXIDATIVE COUPlinG OVER METAL OXYFLUORIDE CATALYSTS

Glucose Isomerization into Fructose Catalyzed by MgO/NaY Catalyst

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Chinese Journal of Chemical Physics 2018年第2期31卷 203-210,246页

作者： Bing Li Lu-wei Li Ying-nan Dong QingZhang Wei-zhengWeng hui-lin wan Anhui Laboratory of Molecule-Based Materials （State Key Laboratory Cultivation Base） College of Chemistry and Materials Science Anhui Normal University Wuhu 241000 China College of Energy and Power Shenyang Institute of Engineering Shenyang 110135 China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University Xiamen 351005 China

The MgO/NaY catalysts prepared by impregnation method were used for the conversion of glucose to fructose in water medium. The effects of MgO loading, reaction temperature, glucose concentration and reaction time on the catalytic performance for the reaction were studied. The activity testing results indicated that fructose could be generated effectively by controlling the components of the catalyst and reaction conditions. The maximal fructose yield of 33.8% with the selectivity of 67.3% was achieved over the 10%MgO/NaY catalyst at 100 ℃ for 2 h. Moreover, the catalysts were characterized by XRD, BET, and CO2-TPD techniques. The structural property of NaY with higher surface area facilitated glucose conversion, and the modulated basicity of the catalyst with MgO addition contributed to the formation of fructose in the tautornerization of aldose to ketose.

关键词： Glucose Fructose Isomerization MgO/NaY

IN SITU RAMAN STUDY OF OXYGEN SPECIES ON BaF_2-LaOF CATALYSTS

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Chinese Chemical Letters 1995年第3期6卷 239-242页

作者： Zi Sheng CHAO Xiao Ping ZHOU hui lin wan and K. R. TSAT (Department of Chemistry, Xiamen university, Xiamen 361005)

The dioxygen species was characterized and their thermostability was investigated on BaF2-LaOF catalyst by means of in situ Roman spectroscopy in the temperature range of 298K Lo 1023K. It is found that there exist ma... 详细信息

关键词：保保福保 IN SITU RAMAN STUDY OF OXYGEN SPECIES ON BaF2-LaOF CATALYSTS 梗梗

OXIDATIVE DEHYDROGENATION OF PROPANE OVER MCl_n/V-Mg-O CATALYSTS

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Chinese Chemical Letters 1993年第12期4卷 1061-1064页

作者： Wei De ZHANG Zhi Min FANG Jia Ning JIANG hui lin wan Qi Rui CAI Department of Chemistry,Xiamen University,Xiamen,361005

Oxidative dehydrogenation of propane over V-Mg-O and MCl_n(M=Cu^+,Li^+, Ag^+,Cd^(2+))promoted V-Mg-O catalysts was *** result showed that the V-Mg-O catalysts were composed of MgO and Mg_3(VO_4)_*** yield of propene was much higher over CuCl and LiCl promoted VMgO catalysts than that over VMgO catalysts at the same reaction *** highest yield of propene reached 23.1% at 500℃ and 6000h^(-1) space velocity.

关键词： OXIDATIVE DEHYDROGENATION OF PROPANE OVER MCl_n/V-Mg-O CATALYSTS XRD over than